A new release of the SE wouldn’t be anywhere near as big of a deal as a restored OOT.
This “surprise announcement” (very vague) will either be the unaltered versions hitting blu-ray at long last or have nothing at all to do with a re-release of the movies.
I’m at a loss to think of what else it could possibly be if it’s not the OOT, but it’s definitely not the SE. Such an announcement would be met with “oh, that was it? meh.”
Either a home video release of the OOT or a 4K UHD release of the SEs
The SE in 4k would only appeal to the small percentage of people who’ve upgraded their hardware.
Again, this “surprise announcement” - whatever it ends up being - will have nothing to do with the SE.